The Bighorn Fire has spread to within a mile of the northern suburbs of Tucson, Arizona. Since the fire started from lightning on June 5 it has burned 4,769 acres, less than a mile from the northernmost suburbs of Tucson.

The fire was active Wednesday night, with flames being pushed downhill by downslope winds. On Thursday temperatures up to 106 degrees with low humidity will increase fire activity and it will again be highly visible on the front range of the Santa Catalina Mountains. Crews will work to hold the fire perimeter and continue building fire line, tying into control features such as roads and rock outcroppings. Aerial resources will support the crews on the ground with water and retardant drops.

Over the next several days communities can expect to see crews and apparatus working in and around subdivisions in the Catalina Foothills.

Resources assigned to the fire include 9 hand crews, 15 fire engines, 7 helicopters, and 10 water tenders.